Rear Sight Windage

[flygrimm]

Is the spring present in the windage knob? If it's bound up it will fetch up like you describe. You may just need a new knob. And by nut, you mean screw, yes?

I would think the screw is the part attached to the elevation knob and the nut is the part in the center of the windage knob, but you have to use a screwdriver instead of a wrench to tighten it. As far as I can tell the spring is built into the elevation knob. There is no spring in the windage knob (the one pictured).

Try to replace the elevation knob assembly?

Stuart